Combination hoist and jack



P 1947- I J. J. UHLENKOTT 2 1 COMBINATION HOIST AND JACK Filed Dec. 27,'1944 2 Sheets-Sheet 1 Inventor J07)? JZ//ezzd Z Z Sept. 2, 1947.UHLENKOTT 2,426,717

COMBINATION HOIST AND JACK Filed Dec. 27, 1944 2 Sheets-Sheet 2 InventorWWW 15% Patented Sept. 2, 1947 UNITED STATES PATENT OFFICE 2,426,717COMBINATION nois'r AND JACK John J. Uhlenkott, Downieville, Calif.Application December 2-7, 1991, Serial Nb. 569,982

1 Claim.

This invention relates to a combination hoist and jack, and has as itsprimary. object the provision of an improved device which may beinterchangeably utilized to push or pull loads.

An additional object of this invention is the provision of such devicehaving a screw-threaded means associated therewith which may be readilyturned in either direction to either lengthen or shorten the jackagainst the pressure of a heavy load.

A more specific object of the invention is the provision of such devicewhich will so act as to preclude slippage of a jack per se when sooperated.

Still another object is the provision of improved pusher plates inassociation with such a jack, which may be readily altered to providehoisting hooks as desired.

Still another object is the provision of such a device which will besturdy and durable in construction, reliable and efiicient in operation,and relatively simple and inexpensive to manufacture and operate.

Other objects reside in the combinations of elements, arrangements ofparts, and features of construction, all as will be more fully pointedout hereinafter and shown in the accompanying drawings, wherein there isdisclosed a preferred embodiment of this inventive concept.

In the drawings:

Figure 1 is a side elevational view of one form of jack embodying thisinvention.

Figure 2 is a side elevational view of the device shown in Figure 1,certain parts thereof being shown in difierent positions of adjustment.

Figure 3 is a top plan view of the device shown in Figure 1.

Figure 4 is an enlarged sectional view taken substantially along theline 4-4 of Figure 3.

Figure 5 i an enlarged perspective View of a constructional detail, and

Figure 6 is an enlarged plan view of one of the operating elements ofthe device.

Like reference numerals refer to like parts throughout the several viewsof the drawings.

Having reference now to the drawings, Ill designates a threaded rod orscrew, surrounding one end of which is a sleeve ll having securedthereto two frame or brace members l2 and 13, which extend to and aresecured to a second sleeve M in longitudinal alignment but spaced fromthe sleeve II. A collar l5, secured as by an extending lug I6 to framemember I3, surrounds a portion of a thrust bearing I1 abutting the endof sleeve II and similarly positioned ad- Jacent the end of sleeve I4 isa second thrust bearing l8. Positioned between collar l5 and thrustbearing I8 is a bevel gear l9 having a threaded interior bore threadedlyengaging the threads of rod l0. Thrust bearings 11 and I8 carryanti-friction or ball bearings as shown to take up end thrust on thesleeves II and I4 and keep pressure off of the gear l9. Journaled inframe or brace member l2 and collar l5 in engagement with bevel gear I9is a second bevel gear 20 having an extending shaft 2!. The end of shank2| is adapted to be engaged by a reversible ratchet handle generallyindicated at 25 (see Fig. 6), including a head 26, a handle 2'! and areverse button 28. Ratchet handle 25 may be of conventional design andinclude a conventional ratchet 30 and spring-pressed pawl 31 (see Fig.4).

From the foregoing it will now be seen that as the ratchet handle 25 ismoved, bevel gear 20 moves bevel gear l9 which in turn, through itsthreaded engagement with rod l0, causes the same to move within thesleeves II and I4.

Secured to one end of sleeve II is a load engaging member generallyindicated at 35 comprising a combined push plate 36 and a hook 31. Plate36 is split to form bifurcations 38 and 39 and provided with spaceddownwardly extending flanges 40 and 4| having pairs of apertures 42passed in aligned relation therethrough. A pivot 43 secures the membersin pivotal relation to sleeve H. The hooks 31 are pivoted at the otheraligned apertures 42.

An identical member 35 is attached at the outer end of sleeve l4 to rodII], as by apivot 44.

Now, from the foregoing it will be seen that when the ratchet member 25is moved in one direction and the members 35 are positioned as shown inFigure 1, that is, with their push faces outwardly, the rod ID will moveoutwardly with respect to its associated sleeve and exert a pressingaction as a jack. Conversely, it will be seen that when the members arein the positions shown in Figure 2', that is to say, with the hooks 31positioned outwardly on the pivots 43 and 44 with the heads or plates 36turned down against the sides of the sleeves II and I4, and the rod IE!extended with respect to its associated sleeve, a reverse ratchet actionby member 25 will cause the members to contract and thus effect a contracting lifting or hoist action.

From the foregoing it will be seen that there is herein provided adevice accomplishing all the objects of this invention and others,including many advantages of great practical utility and commercialimportance.

As many embodiments may be made of this inventive concept, and as manymodifications may be made in the embodiment hereinbefore shown 7anddescribed, it is to be understood that all matter herein is to beinterpreted merely as illustrative and not in a limiting sense.

I claim:

In a combination hoist and jack, a screw, 2.

bevel gear having an interiorly threaded bore mounted on said screw,sleeves surrounding and rotatably mounting said screw on opposite sidesof said gear, end thrust bearings between the inner ends of said sleevesand said gear, brace members connected to said sleeves on opposite sidesthereof and straddling said gear and thrust bearings, a collar securedto one brace member and surrounding the screw between the thrustbearings, a second bevel gear rotatably mounted in the other bracemember and said collar and disposed in mesh with the first gear, meansfor rotating said second bevel gear in either direc-' or pulling loads.

' JOHN J; UHLENKO'IT.

REFERENCES CITED The following references are of record in the file ofthis patent: V

UNITED STATES PATENTS Number Name Date 1 1,519,946 Williams Dec. 16,1921 1,657,781 Brown June 31, 1928 1,261,003 Babcock Apr. 2; 19181,550,885

Dart Aug. 25, 19.25

